110 MESOZOIC FLORAS OF UNITED STATES. 



resembles the leaflets given by Phillips as PterophyUum rigidum," but its 

 leaflets are not narrowed so much toward their tips. They are also like 

 Heer's Podozamites obtusifoiius,'' so named on the plate, but described as 

 Baiera longifolia Pomel spec. (Dicropteris longifolius Pom.). The plant is 

 probably nearer to Nathorst's PterophyUum f cteniforme," from the Rhetic 

 of Sweden, and possibly may be identical with it. 



PL XXIV, Fig. 11 gives portions of two leaflets in a position to indi- 

 cate that they were attached to the same midnerve. One of them that is 

 almost entire shows a length of 6 cm. Fig. 12 shows parts of several 

 thick leaflets that were probably attached to the same axis. These show 

 the greater strength of the central nerves. Fig. 13 shows the tips of 

 several leaflets corresponding to those given in Fig. 12. Fig. 14 repre- 

 sents a nearly entire leaflet in which the base seems to be preserved. 

 Fig. 15 shows this enlarged. Fig. 16 gives a nearly entire leaflet of the 

 smallest kind, with the base apparentl}^ preserved. 



The plant is always rare, but is most common at locality No. 7. It 

 occurs also at localities Nos. 1, 18, and 19. 



Podozamites lanceolatus (Lindley & Hutton) Friedrich Braun non Emmons. 

 PL XXIV, Figs. 17-20. 



1836. Zamia lanceolata L. & H.: Foss. FL Gt. Brit., Vol. Ill, p. 121, pi. cxciv. 

 1840. Zamites lanceolatus (L. & H.) Fr. Br.: Verzeichn. Kreis-Nat.-Samml. z. Bay- 



reuth, p. 100. 

 1843. Podozamites lanceolatus (L. & H.) Fr. Br. (non Emm.) in Miinster: Beitr. z. 



Petrefacten-Kunde, Vol. II, Pt. VI, p. 33. 

 1847. Zamites distans longifolia Fr. Br.: Flora, VoL XXX, p. 85 (nomen). 

 1867. Zamites distans longifolia Fr. Br. Schenk: Foss. FL d. Grenzsch., p. 162, 



pi. xxxvii, fig. 1. 

 1876. Podozamites lanceolatus genuinus Heer: FL Foss. Arct., Vol. IV, Pt. II (Jura- 



Fl. Ostsibiriens) , p. 108, pi. xxvi, fig. 10." 



There are in the Oregon Jurassic flora a number of leaflets and frag- 

 ments of leaflets that agree with some of the forms united in the species 



c Geology of Yorkshire, 3d ed., p. 228, lign. 57. 



6 Fl. Foss. Arct., Vol. IV, Pt. I, pi. Tiii, fig. 6 (cf., p. 39). 



c Flor. vid. Bjuf, Hft. II, p. 69, pi. xiv, fig. 1. 



f' Heer has caused much confusion by giving this combination to the type form of Lindley and Hutton, 

 especially as Schenk applied the name Zamites distans genuina to a closely related form, and the names distans 

 and lanceolatus are constantly interchanged; but Heer's Podozamites lanceolatus genuimu is Friedrich Braun's 

 Zamites distans longifolia, accepted by Schenk, and both, according to Heer, are the Zamia lanceolata of Lindley 

 and Hutton.— L. F. W. 



